U.S. inflation accelerated to 3.7% in September, driven by soaring gasoline and energy costs following the Iran war, according to federal government data released on Wednesday. The reading exceeded expectations and arrived just weeks before the midterm elections, intensifying economic pressure on consumers and prompting market speculation about upcoming Federal Reserve interest rate decisions.
The consumer price index increased 0.6% on a monthly basis in September, marking the biggest gain in five months and rising from a 3.4% annual pace in August. Government figures show that inflation stands well above the 2.4% rate recorded in February prior to the outbreak of the Middle East conflict. Federal Reserve Chair Kevin Warsh noted last month that the plain fact is that inflation is too high and has been for too long
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Energy Costs and the Iran War Drive September Price Surges
The conflict in the Middle East has continued to ripple through global supply chains, generating higher expenses across the United States economy. Energy prices rose 5.2% on a monthly basis in September and are up 20.4% from a year ago. Gasoline prices jumped 9.1% in September alone, accounting for more than half of the monthly increase in the consumer price index, according to the U.S. Bureau of Labor Statistics. AAA data shows the average nationwide price at the pump reached $4.33 per gallon on Wednesday, up 45% from $2.98 per gallon right before the war began on February 27.
Diesel feeds into supply costs for trucks, trains, and ships transporting goods to stores, as well as farming, manufacturing, and heating. Inflation is an oil story,
said Michael Reid, head of U.S. economics at the Royal Bank of Canada, adding that higher fuel prices take months to trickle through to consumers. Airline fares rose 22% over the past year, reflecting higher jet fuel costs.
Core Inflation, AI Demand, and Mixed Relief at the Grocery Store
Economists closely monitor core inflation, which strips out volatile food and energy prices to examine underlying economic dynamics. Core prices rose 2.6% in September from a year earlier, up from 2.4% in August. Moody’s chief economist Mark Zandi called the report uncomfortably strong and stated that the war’s fingerprints are all over the report,
adding that it’s driving a lot of the inflationary pickup.
Beyond energy, surging investment in data centers and artificial intelligence has pushed up prices for computer chips and consumer electronics. Amid these widespread increases, grocery prices offered a bright spot, falling 0.1% in September. Beef prices declined 1% over the month, which Zandi attributed partly to a temporary reprieve on beef tariffs announced by President Donald Trump in August.
Consumer Sentiment Drops as Cost of Living Mounts
The inflation report arrives less than a month before midterm elections where affordability remains a central issue. Consumer sentiment has dropped close to the lowest level ever recorded in the 74-year history of the University of Michigan’s monthly survey. Frustration over cost-of-living continues to mount, as consumers across the political spectrum believe that the trajectory of the economy has weakened since the beginning of the year,
said Joanne Hsu, director of the University of Michigan Surveys of Consumers. An Associated Press-NORC Center for Public Affairs Research poll found that just 17% of U.S. adults approve of Trump’s handling of the cost of living.
Meanwhile, financial markets are reassessing monetary policy ahead of the Federal Reserve’s next policy meeting on October 27–28. While most Wall Street investors expect the central bank to hold rates steady this month, the hotter-than-expected inflation data has doubled the odds of a rate increase according to CME FedWatch futures pricing, pushing bond yields higher across the board.
U.S. Treasury yields experienced a mixed session following the reopening of the market after a holiday break for Columbus Day, with the 10-year Treasury yield trading near 5.1937% as oil prices dropped ahead of the inflation data. Other maturities shifted slightly, with the 1-month yield standing at 4.042%, the 3-month yield rising to 4.179%, the 6-month yield climbing to 4.334%, and the 1-year yield reaching 4.467%.
The inflation release followed a sluggish monthly jobs report showing that employers added 29,000 jobs in September, a sharp slowdown from the 162,000 jobs added in August. As analysts watch macroeconomic indicators, Bitcoin traded around $83,679 ahead of the consumer price data release and an anticipated speech by Fed Chair Kevin Warsh in Thailand.
